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Just fyi, fellas, JP’s smaller diameter gas rings are, in-fact by design. It spooked me too when I first got my JP LMOS, & I even replaced ‘em when I saw it wouldn’t hold up to the ‘stand test’ & the bolt dropped straight inside the carrier. But upon READING the literature that was provided (at leas...
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The title says it all. This bolt is dimensionally correct (verified with calipers), but the enhanced gas ring is dimensionally smaller than the standard diameter of the normal three gas rings. It slides loosely in the BC. No bueno! I had to replace the rings to get it to work. So for the price, I co...
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by
George Williamson,
Verified Owner
from NJ, United States
Written on November 19, 2024
I installed this in a 400 Legend AR15. It works wonderfully well. The Valkerie, 6.8 SPC and 400 Legend have the same case head. So it fits and functions very well. Fit and finish is perfect. Now, this corrected primer extrusion around the firing pin.
Would recommend: Yes
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by
George Williamson,
Verified Owner
from NJ, United States
Written on November 12, 2024
I installed this on a 400 Legend I built. I handload my ammo, and this allows me to progress to the upper end of my pressure range without primer extrusion. Although my load was not close to maximum, i was getting primer extrusion around the firing pin indent. After this upgrade i am cruising 1/2 a grain under maximum with no primer extrusion at all. There never was any over pressure signs other than primer extrusion.
Would recommend: Yes
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by
Yo,
Verified Owner
from AZ, United States
Written on December 26, 2023
I'm sure the bolt will be fine but you would think that if you spent this kind of money on a premium bolt that they would have their act together. The one-piece "enhanced" gas ring was too loose and wouldn't even hold the weight of the carrier. Swapped it out for standard mil-spec rings, good to go.
Pros:
Stronger bolt
Cons:
Have to swap the gas rings out
Best Used for:
Pew pew pew
Would recommend: Yes
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